Identification and properties of isolated field elliptical galaxies from CFHTLS-W1
Abstract
We present a catalogue of isolated field elliptical (IfE) galaxies drawn from the W1 field of the Canada-France-Hawaii Telescope Legacy Survey (CFHTLS). 228 IfEs were identified from a flux-limited $(r<21.8)$ galaxy catalogue which corresponds to a density of 3 IfE/sq.deg. For comparison we consider a sample of elliptical galaxies living in dense environments, based on identification of the brightest cluster galaxies (BGCs) in the same survey. Using the same dataset for the comparison sample ensures a uniform selection, including in the redshift range as IfEs (i.e. $0.1<z<0.9$ ). A comparison of elliptical galaxies in different environments reveals that IfEs and BCGs have similar behaviours in their colours, star formation activities, and scaling relations of mass-size and size-luminosity. IfEs and BCGs have similar slopes in the scaling relations with respect to cluster ellipticals within the $-24 ≤ Mr ≤ -22$ magnitude and $10.2< \textrm{log}(M_{*}/ \textrm M_\odot)≤12.0$ mass ranges. Three IfEs identified in this study can be associated with fossil groups found in the same survey area which gives clues for future studies.
- Publication:
-
Publications of the Astronomical Society of Australia
- Pub Date:
- September 2022
- DOI:
- 10.1017/pasa.2022.28
- arXiv:
- arXiv:2205.10669
- Bibcode:
- 2022PASA...39...31U
- Keywords:
-
- galaxies: elliptical and lenticular;
- cD;
- galaxies: evolution;
- galaxies: formation;
- galaxies: fundamental parameters;
- surveys;
- Astrophysics - Astrophysics of Galaxies
- E-Print:
- 23 pages, 18 figures, 10 tables, accepted for publication in PASA